{"id":"CVE-2021-33045","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33045","generatedAt":"2026-10-31T14:01:39.761Z","title":"Dahua IP Camera Authentication Bypass Vulnerability","description":"The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.","published":"2021-09-15T22:15:11.000Z","lastModified":"2026-06-17T03:54:04.000Z","status":"Analyzed","sourceIdentifier":"cybersecurity@dahuatech.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-287"],"affected":["dahuasecurity/ipc-hum7xxx firmware","dahuasecurity/ipc-hx3xxx firmware","dahuasecurity/ipc-hx5xxx firmware","dahuasecurity/nvr-1xxx firmware","dahuasecurity/nvr-2xxx firmware","dahuasecurity/nvr-4xxx firmware","dahuasecurity/nvr-5xxx firmware","dahuasecurity/nvr-6xx firmware","dahuasecurity/vth-542xh firmware","dahuasecurity/vto-65xxx firmware","dahuasecurity/vto-75x95x firmware","dahuasecurity/xvr-4x04 firmware","dahuasecurity/xvr-4x08 firmware","dahuasecurity/xvr-5x04 firmware","dahuasecurity/xvr-5x08 firmware","dahuasecurity/xvr-5x16 firmware","dahuasecurity/xvr-7x16 firmware","dahuasecurity/xvr-7x32 firmware"],"epss":{"score":0.99593,"percentile":0.99947,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2024-08-21","dueDate":"2024-09-11","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://www.dahuasecurity.com/aboutUs/trustedCenter/details/582; https://nvd.nist.gov/vuln/detail/CVE-2021-33045"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 11 September 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cybersecurity@dahuatech.com"},{"url":"http://seclists.org/fulldisclosure/2021/Oct/13","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"cybersecurity@dahuatech.com"},{"url":"https://www.dahuasecurity.com/support/cybersecurity/details/957","tags":["Vendor Advisory"],"source":"cybersecurity@dahuatech.com"},{"url":"http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Oct/13","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.dahuasecurity.com/support/cybersecurity/details/957","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33045","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33045","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}